Improvement in bolt-heading machines



UNITED STATES PATENT (DEEICEa ,ioHN B. ABBE, on MANCHESTER, NEW HAMPSHIRE.

iMPRovEMENT in eoLT-HEAoiNG MAcHiNs.

Specification forming part of Letters Patent No. 146,374, dated January 13,1S74;japplicaticn filed i May 23, 187:3.

To all whom t may concern:

Be it known that I, JoHN It. ABBE, of Manchester, in the county of Hillsborough and State of New Hampshire, have invented certain Improvements in Bolt-Heading Machines, of which the following is a specification:

This invention more particularly relates to bolt-forging machines of an upright descrip tion, similar tothe one described in Letters Patent No. 115,555, issued to me June 6,1871, in which the bearings or working surfaces are raised above the cinderswhich fall from the work and the water used to keep the dies and upset cool, and in which the bolt is headed by the combined action of vertically-movin g-upp er and lower dies and oppositely-arranged reciprocating side dies, moving in intermediate relation with the vertically-operating upper and lower dies, and with a horizontally-reciprocal:- ing upset.

.l `The invention generally consists in certain `novel constructions and combinations of devices for operating' the several dies and upset, giving to the side dies two forwardandback ward movements for each opening and closing of the other dies, without the aid of cams, and the upper and lower dies being operated by a system of levers with curved slots, deriving their motion from the same cross-head that operates the upset, also, but indirectly, the side dies, whereby great simplicity, durability,

`and efciency are obtained.-

In the accompanying drawing, Figure 1 represents a longitudinal and partly central sectional elevation ofthe machine 5 Fig. 2, a partly broken or sectional plan of the same 5 and Fig. 3, a side view, in part, illustrating one of the side dies and lever for working the same.

Similar letters of reference indicate correspondin g parts.

A is the bed of the machine, supported on suitable legs or uprights; and B, the forward end, to which is tted the vise for holding the bolt in place relatively to the upset and'forging-dies, and which vise, as in my patent hereinbefore referred to, may be actuated by treadle. C is the main or crank shaft, at the back end of the machine, for giving motion to the several forging dies orhainmers and upset. This shaft may be operated and controlled, to prevent reaction and to provide for starting and stopping it, accordingly as a clutch is thrown in or out, by a combination of devices substantially similar to that described for a like purpose in my patent hereinbefore referred to, or by any suitable means. D is ahorizontally-sliding crosshead, operated by a pitmainE, from the crankshaft G. Said cross-head is also the upsetcarrier, it having the upset Gr` attached to it in front. Projecting outwardly from opposite sides of such cross-head or upset-carrier, near its back, are lugsor projections b b, which may be extensions of the pin that connects the pitman E with the cross-head. To the outer end of these lugs links c c are pivoted, Vwith provision, if desired, for adjustment of the lugs, and said links connected at their outer` en'ds to the back ends or arms of levers F F, working on intermediate vertical fulcrums d d. The front ends or arms of these levcrsenter slots in oppositely-arranged horizontal front slides H H,

the inner ends of which carry the side hammers or dies I I. By this method of working the side dies, cams, which are difficult and eX- pensive to make and keep in repair, are dispensed with, and a link-motion substituted therefor, which will cause the side hammers or dies to strike twice for each single revolution of the crank-shaft C, said dies closing each.

time. The links c o occupy a straight or rightangled position relative to the motion of the cross-head D, and opening as the links are flexed to either side of such line or position.

This action, while it secures a double blow for the side hammer, gives ample time for the upset G and upper and lower dies K L to enter in between them. While the upset acts on the bolt during the forward stroke of the crosshead D, the upper and lower dies K L move toward each other vertically, or close on the bolt as the cross-head and upset make their back stroke. These `dies K L are moved up and down in reverse directions to each other- Q, arranged to travel in ways in the slide I), and carrying` the upper die K. The levers INI M have each similarly shaped and arranged curved slots hin their back ends, and Vthe vlever N a reversely-eurved slot, z', in its back end. A pin, l, which may, if desired, be fitted with anti-friction rollers, extends across the upper rear portion of the crosshead through the slots h 110i' the leversMMN,` which not only causes the cross-head, as it moves back and forth, to give the necessary up-anddown movements to the upper and lower dies K L, but operates said dies so that they close on and are released from contact with the bolt at the periods of their fastest movements, thus reducing the heating of the dies, lessening' their tendency to lire-crack, and saving repairs, &c. The upset Gr may be made of cast-iron, but it is preferred to construct the several dies of steel. S is a cupboard o'r receptacle for tools used in repairing or working the machine. This receptacle I am enabled, by the disposition of the working parts as described, to arrange on or in the bed of the machine at a convenient height and position for the workman.

What is here claimed, and desired to besecured by LettersrPatent, is-

l. The adaptation herein described and shown of the slides H, levers F, links c, lugs or pin b, and the crank on shaft G, in virtue of vwhich the side hammers or dies I are moved to impart-each two blows during each and every revolution of the crank-shaft.

2. The combination, with the reciprocating' cross-head or upset-carrier D, of the levers M M N, the reversely-eurved slots h z', the pin l, the slidesl? Q, and the upper and lower dies KL, essentially as shown and described.

3. The combination of the levers F F and M M N, the links c c, the reversely-curved slots h i, the npin Z, thereeiprocating cross-head D, with its attached upset G, the slides H I) i?, land the dies I I KL, substantially as speci- 'JoHN n.. ABBE.

Witnesses:

JUSTIN SPEAR, H. D. LORD. 

